19091880739 has 2 divisors, whose sum is σ = 19091880740. Its totient is φ = 19091880738.

The previous prime is 19091880683. The next prime is 19091880767. The reversal of 19091880739 is 93708819091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19091880739 - 2⁷ = 19091880611 is a prime.

It is a super-2 number, since 2×19091880739² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19091880739.

It is not a weakly prime, because it can be changed into another prime (19091880799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9545940369 + 9545940370.

It is an arithmetic number, because the mean of its divisors is an integer number (9545940370).

Almost surely, 2^19091880739 is an apocalyptic number.

19091880739 is a deficient number, since it is larger than the sum of its proper divisors (1).

19091880739 is an equidigital number, since it uses as much as digits as its factorization.

19091880739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 55.

The spelling of 19091880739 in words is "nineteen billion, ninety-one million, eight hundred eighty thousand, seven hundred thirty-nine".